X-ray absorption spectroscopy investigation of the electronic structure of superconducting FeSex single crystals

被引：19
|
作者：
Chen, C. L. [1 ]
Rao, S. M. [1 ]
Dong, C. L. [2 ]
Chen, J. L. [3 ,4 ]
Huang, T. W. [1 ]
Mok, B. H. [1 ]
Ling, M. C. [1 ]
Wang, W. C.
Chang, C. L. [3 ]
Chan, T. S. [2 ]
Lee, J. F. [2 ]
Guo, J. -H. [4 ]
Wu, M. K. [1 ]
机构：
[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
[3] Tamkang Univ, Dept Phys, Tamsui, Taipei Cty, Taiwan
[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA
来源：
EPL | 2011年 / 93卷 / 04期
关键词：
ALPHA-FESE;
D O I：
10.1209/0295-5075/93/47003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
X-ray absorption spectroscopy (XAS) Fe K-edge spectra of the FeSex (x = 1-0.8) single crystals cleaved in situ under vacuum reveal characteristic Fe 4sp states and a lattice distortion. The Se K-edge spectra point to a strong Fe 3d-Se 4p hybridization giving rise to itinerant charge carriers. A formal charge of similar to 1.8+ for Fe and similar to 2.2- for Se was evaluated from these spectra in the FeSex (x = 0.88). The charge balance between Fe and Se is assigned to itinerant electrons located in the Fe-Se hybridization bond. As x decreases the 4p hole count increases and a crystal structure distortion is observed that in turn causes the Fe separation in the ab-plane change from 4p orbital to varying (modulating) coordination. Powder X-ray diffraction (XRD) measurements also show a slight increase in lattice parameters as x decreases (increasing Se deficiency). Copyright (C) EPLA, 2011
引用
收藏
页数：5
相关论文
共 50 条
  • [41] DETERMINATION OF THE ATOMIC AND ELECTRONIC-STRUCTURE OF CATALYSTS BY X-RAY ABSORPTION-SPECTROSCOPY
    LYTLE, FW
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1984, 188 (AUG): : 74 - COLL
  • [42] Electronic structure of nickel porphyrin NiP: Study by X-ray photoelectron and absorption spectroscopy
    G. I. Svirskiy
    N. N. Sergeeva
    S. A. Krasnikov
    N. A. Vinogradov
    Yu. N. Sergeeva
    A. A. Cafolla
    A. B. Preobrajenski
    A. S. Vinogradov
    Physics of the Solid State, 2017, 59 : 368 - 377
  • [43] Electronic Structure of Warm Dense Copper Studied by Ultrafast X-Ray Absorption Spectroscopy
    Cho, B. I.
    Engelhorn, K.
    Correa, A. A.
    Ogitsu, T.
    Weber, C. P.
    Lee, H. J.
    Feng, J.
    Ni, P. A.
    Ping, Y.
    Nelson, A. J.
    Prendergast, D.
    Lee, R. W.
    Falcone, R. W.
    Heimann, P. A.
    PHYSICAL REVIEW LETTERS, 2011, 106 (16)
  • [44] Electronic structure of transition metal - Cysteine complexes from X-ray absorption Spectroscopy
    Leung, Bonnie O.
    Jalilehvand, Farideh
    Szilagyi, Robert K.
    JOURNAL OF PHYSICAL CHEMISTRY B, 2008, 112 (15): : 4770 - 4778
  • [45] X-ray absorption spectroscopy: A tool to study the local atomic and electronic structure of ceramics
    CEA Saclay, Gif sur Yvette, France
    J Eur Ceram Soc, 15 (2253-2261):
  • [46] Electronic structure of fluorinated carbon nanotubes studied by X-ray absorption and photoelectron spectroscopy
    Brzhezinskaya, M. M.
    Vinogradov, N. A.
    Muradyan, V. E.
    Shul'ga, Yu. M.
    Vinogradov, A. S.
    FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES, 2008, 16 (5-6) : 335 - 339
  • [47] Electronic structure of LaFeAsO1-xFx from x-ray absorption spectroscopy
    Kroll, T.
    Bonhommeau, S.
    Kachel, T.
    Duerr, H. A.
    Werner, J.
    Behr, G.
    Koitzsch, A.
    Huebel, R.
    Leger, S.
    Schoenfelder, R.
    Ariffin, A. K.
    Manzke, R.
    de Groot, F. M. F.
    Fink, J.
    Eschrig, H.
    Buechner, B.
    Knupfer, M.
    PHYSICAL REVIEW B, 2008, 78 (22):
  • [48] Magnetic properties, x-ray absorption spectroscopy and electronic structure of GdCrTiO5
    Guedes, E. B.
    Martins, H. P.
    Abbate, M.
    Masunaga, S. H.
    Ramirez, F. E. N.
    Jardim, R. F.
    Mossanek, R. J. O.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 724 : 67 - 73
  • [49] Electronic Structure of CuI@SWCNT Nanocomposite Studied by X-Ray Absorption Spectroscopy
    Generalov, A. V.
    Brzhezinskaya, M. M.
    Puettner, R.
    Vinogradov, A. S.
    Chernysheva, M. V.
    Eliseev, A. A.
    Kiselev, N. A.
    Lukashin, A. V.
    Tretyakov, Yu. D.
    FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES, 2010, 18 (4-6) : 574 - 578
  • [50] Electronic structure of thallium filled skutterudites studied by x-ray absorption and Mossbauer spectroscopy
    Long, GJ
    Mahieu, B
    Sales, BC
    Hermann, RP
    Grandjean, F
    JOURNAL OF APPLIED PHYSICS, 2002, 92 (12) : 7236 - 7241
12345